TireCradles Prevent Tire Flat Spotting

It’s a fact that when a vehicle sits for long periods the tires flat spot. The reasons that tires flat spot are basically a function of pressure, temperature and time. Flat spotting is either temporary, in that the tire will round out with driving, or permanent which affects the belting and casing of the tire. Permanent flat spots effectively ruin the tire. There are no real indicators that tell when a temporary flat spot will become permanent. TireCradles will prevent any type of flat spotting from occurring on your low-profile tires.

Benefits of Using TireCradles

  • Guaranteed for Life
  • Accepts Vehicle Weights Up to 10,000lbs.
  • Accepts Tread Widths from 4 to 15 Inches
  • Proven by Independent Testing to Prevent Tire Flat Spots
  • Easy to Use - Just Park on Them!!

  • Patented
  • Proudly Made in the USA
  • Great for Long Term or Daily Storage
  • Conforms to the Unique Shape of Your Tire
  • The Original Flat Spot Preventing Product on the Market

What Has Been Tried To Prevent Tire Flat Spots

Styrofoam (expanded polystyrene) and rubber mats both used by low cost knockoffs have been tried and failed. Comfort floor mats, carpet squares piled with carpet insulation or plywood, and layers of cardboard have been tried and failed. None of these options have worked! Our company began to look at the physics of tire flat spotting; how they are measured, what causes them, etc. and in the mid 1990s developed TireCradles based on that research. 

How Flat Spots Are Measured

Flat spots are measured using two criteria; peak to peak changes and harmonics. No tire is perfectly round and the peak to peak changes ( P/P ) reflect how much pressure must be applied to the tire in downforce to make the tire perfectly round. That is, you apply pressure at the axle while the tire is rotating until the tire is perfectly round. A flat spotted tire will increase this value by a minimum of about 4 psi. In our testing, this value has more than doubled from the original value! The test showed a change from 16.0 to 32.2 psi.


Temporary Flat Spots

Temporary flat spots are simply rubber compression and they go away as soon as the rubber warm and re-rounds. These are always either 1st or 2nd harmonic flat spots. It is crucial to remember that all permanent flat spots begin with a temporary flat spot. The only difference is how long the vehicle stays parked. Harmonics are measured from 1 to 10 with ten being the least case scenario. A first harmonic flat spot ( 1 ) means that for every rotation of the tire, at any speed, the flat spot is felt. As such, you would feel this going 22 mph or 122 mph.


Permanent Flat Spots

A high harmonic flat spot, 6 or above, is often not recognized as a flat spot but is often confused with a mechanical problem. This is best explained as a particular speed where the problem manifest itself. An example would be a car that has a shimmy or vibration from 66 to 70 mph but none above or below that speed range. This is almost always a high harmonic permanent flat spot.


We have seen cases where torque converters, clutch assemblies and half shafts have been replaced trying to fix the problem; it is almost always tire flat spotting. For the car owner, this is very time consuming, personally frustrating, and expensive if the car is out of warranty.


Your tires are designed to operate in a wide variety of temperatures. Most performance tires are designed to function best at triple digit temperatures. While the rubber compounds offer the best performance at these temperatures, flat spotting is also accelerated. What makes your tires work also helps them to flat spot. Parking a hot, soft tire on a cool concrete surface accelerates tire flat spotting because the contact patch is stressed by the temperature and density differences. Basically, the tire must "give" because it is softer and hotter than a concrete floor.


Tire construction also determines the tendency of a tire to flatspot. Soft compounds and aspect ratios associated with performance tires accelerate flat spotting. An aspect ratio of 50 or less has little sidewall flexion due to the short sidewalls. Thus, the pressure is absorbed by the contact patch and the tire flat spots. Basically, the wider the tire, the greater its tendency to flatspot. Vehicle weight, time parked and ambient temperature all factor in flatspotting your tires. TireCradles are designed to prevent flat spotting on all road going tires by negating those variables. They keep your tires insulated from the temperatures and pressures that cause flat spotting, regardless of the amount of time a vehicle is parked.


A Few Words About Cost

TireCradles are made of a very dense, polyurethane polymer and this polymer is very costly, but it is the only polymer that works for this specific application. Think of it from this perspective, how many sets of tires will you own in your lifetime and what is the cost of replacing a ruined performance tire or tires? We think that you will agree that TireCradles are really smart insurance. TireCradles will save you money in the long term because you will be preserving and protecting your tires rather than replacing them. It’s your car and your ride — you decide.